PHP + RegExp, character range search with exception

Question

PHP

Hello. Please tell me how to write the regular expression [az[^sgm]] in php (non-working example), i.e. all characters from range az except characters sgm?

I found something similar with character classes ( www.php.net/manual/ru/regexp.reference.character-classes.php ): [12[:^digit:]], but I need certain characters, not classes.

Answer 1

The expression is called Double Negative:
[^[:^lower:]sgm]

Answer 2

Something like this:[a-f,h-l,n-r,t-z]

Answer 3

What if you use conditional subpatterns ? For example:(?(?=[a-z])[^sgm])

Answer 4

(?![cde])[a-z]


Answer 5

Well, actually it's not PHP, but PCRE. And it's most likely not possible.

Answer 6

You can try this:
/^[^\Wsgm]+$/
Explanation: \W means all characters not included in the word, ^ inverts this class, i.e. \W becomes \w and also excludes sgm characters following \W from the current class.